134 True — On South American Delphinidm. 



For the sake of brevity I have cited the earlier paper by its" 

 date, 1893, and the later one by 1896, adding the proper page 



•a umber. 



"DeJphinus? super; illosus Lesson" (1893, p. 6, pi. 1, fig. 2). 



Dr. Philippi copies Lesson's figure of this species and makes' 

 a few remarks regarding it, but mentions no new material. It 

 seems hardly probable that the species belongs to the genus 

 Delphimis. The shape of the snout woidd rather indicate 

 LagenorhynchiiSy though the coloration is not characteristic of 

 Ehat genus. 



s< Delphinus caemleo-aSbus Meyen" (1893, p. 6, pi. I, fig. 1). 



This species, the type-skull of which I examined iu 1887, be- 

 longs to the genus Prodelphinus. (See BulL 36, U. S. Nat, 

 Mus., p. 62.) 



"Defphitius amphitriteus Philippi" (1893, p. 7, pi. 1, fig. 3). 



The osteological characters of this species are not given, nor 

 is the skull figured, and it is uncertain, therefore, whether it 

 belongs to the genus Delphinus or Prodelphinus. The proba- 

 bilities are much in favor of the latter. Dr. Philippi compares 

 it with ccerideo-albus, but points out differences of color and 

 proportions by which it may be distinguished from that species. 

 In this he is no doubt justified, though as cwrideo-albxis is a 

 South American species and its range of color variation is un- 

 known, later observations may show that there is a closer rela- 

 tionship between these two forms than can now be made out. 

 It is interesting to note the resemblance between' amphitriteus 

 and the Delphinus marginatum of Pucheran, which I consider 

 identical with Prodelphinus euphrosyne (Gray); also between 

 the former and the Delphinus lateralis of Peale, which is like- 

 wise probably a Prodelphinus (See Bull. 36, U. S. Nat. Mus. 7 

 pi. 15, figs. 1 and 3). 



